Slide rule pencil



SPt 17, 1957 N. E. NlcoLET ETAL 2,806,649

SLIDE `RULE PENCIL Filed Nov. 6, 1953- l n, III

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United States Patent O M 2,806,649 SLIDE RULE PENCIL Nicholas E.Nicolet, Bronx, and Herman Neiges, Brooklyn, N. Y.; said Neiges assignorto said Nicolet Application November 6, 1953, Serial No. 390,494 1Claim. (Cl. 23S-79.5)

This invention relates to a slide rule pencil.

It is an object of the present invention to provide a combined sliderule and pencil construction which will render available to the user ofthe slide rule a pencil for immediately putting down the data obtainedtherefrom.

It is another object of the invention to provide a slide rule pencilwhich can be carried in the pocket and to thereby eliminate the need forcarrying two -separate items such as a separate bulky slide rule by theperson making vfrequent calculations with the slide rules and to renderthe slide rule readily available from the vest pocket and in the samemanner that a pencil is always readily available.

It is another object of the invention to provide a slide rule pencilwherein the parts of the slide rule vare lixed to the pencil parts foreasily relative sliding movement therebetween and such that thealignment of the parts are effectively maintained regardless of thedistance to which the slide part has been extended from the pencilparts.

It is another object of the invention t provide a slide rule pencilwherein the slide rule parts can be easily accommodated on standardpencil parts in a rigid and simple manner.

Other objects of the invention are to provide a slide r-ule pencilconstruction which is simple, inexpensive to manufacture, has a minimumnumber of parts, easy to manipulate, of pleasing appearance, durable andhas long life, effective and elli-cient in use.

For other objects and a better understanding of the invention, referencemay be had to the following detailed description taken in connectionwith the accompanying drawing, in which:

Figure 1 is a side view with the parts unextended;

Fig. 2 is a side view with the slide part extended from the pencil partas in use;

Fig. 3 is an enlarged fragmentary sectional view taken on line 3 3 ofFig. 1;

Fig. 4 is an enlarged fragmentary sectional view taken on line 4 4 ofFig. 1.

Referring now to the gures, represents a main body part, preferablylformed of plastic and having a hollow shell portion 11 extendedtherefrom. This shell portion has an elongated slot 12 with slide rulegraduations A and D 1extending respectively along the opposite sides ofthe slot. The end of the sleeve portion 11 is open and a movable sliderule part 13 having a C scale thereon, lis slidable.

An 4automatic pencil head indicated generally at 14 is fixed to theplastic body 10. This pencil head includes a lead container sleeve 15extending into the sleeve portion 11 and having the usual helical slot16. This sleeve 15 extends through the body 10 and its operating member17 is embedded therein. This operating member 17 is serrated to providea good grip with the plastic material. As tapered head body 18 is turnedrelative to the body 10 a pencil lead 19 will be extended or retractedfrom the end thereof.

On the sleeve 15 there is lixed a serrated member 21 that is securedagainst axial displacement thereon by a shoulder 22 and an outwarddepression 23. Preferably the member 21 has a tight t `and is 'heldagainst turning upon the sleeve 15 as well as against axial displacementthereupon. Fixed to the member 21 is an internal sleeve 2,806,649Patented Sept. 17, 1957 lCe \ 2 24 that extends substantially the fulllength of the sleeve portion 11 and has at its outer end a radiallyoutwardly turned flange 25.

The slide member 13 in addition to the scale C of plastic has a slidesleeve 26 vslidable upon the inner sleeve 24 and concentric therewith.This sleeve has a reduced diameter end portion 27 adapted to slidablylit the inner sleeve 24 and to provide a bearing surface. The majorportion of the sleeve 26 is radially spaced from the surface of theinner sleeve 24. This reduced diameter end portion 27 provides lessfrictional engagement with the sleeve 24 and thereby makes the slidepart 13 more free for easy sliding movement along the inner sleeve 24.

The scale C abuts a ring 28 and is preferably held in place upon thesleeve portion 26 by an adhesive. The ring 28 is shouldered against theouter end of the sleeve 26 as indicated at 29. An eraser 30 is providedin the 4outer end of the sleeve 26 and access to the eraser can be hadby removing a plastic `sleeve cap 31 having a metal head 32 on its outerend securing a pocket retaining clip 33 that has an enlargement 34 thatbears against the outer surface of the ring 28. The inner surface of theplastic sleeve cap 31 bearing against diametrically opposite elongatedprojections 35 and 36 in a friction-tight manner to normally hold thecap 31 in place over the eraser 30.

The inner surface of the sleeve 26 rides over the edge of the flange 25of the inner member to maintain a concentric radially spacedrelationship of the sleeve 26 upon the sleeve 24 and helps to maintain atrue axial relationship therewith during the sliding movement.

It will now be apparent that there has been provided a combined penciland -slide rule wherein the pencil parts serve as a support for theslide rule parts, the inner sleeve 24 being rigidly fixed to the pencilsleeve 15 by means of the member 21 and this sleeve in turn supportingthe slide part 13. Slide rule parts are used in the regular manner withthe different iscales being prepared with one another to give up thedesired answer or data. It will also be apparent that the slide ruleparts serve las a support for pencil and eraser parts and that a cap canconveniently be disposed upon one of the slide parts to cover the eraserand provide a clip portion by which the pencil can be secured to thepocket of the owner.

While various changes may be made in the detail construction, it shallbe understood that such changes shall be within the spirit and scope ofthe present invention as defined by the appended claim.

What is claimed is:

A slide rule comprising Ia hollow outer sleeve having an elongated slotwith slide rule graduations on the opposite sides thereof, a concentricinner sleeve secured within lsaid outer sleeve, a third hollow sleevedisposed between and spaced apart from said outer sleeve and said innersleeve and having slide rule graduations alignable with the graduationson said outer sleeve, a reduced diameter portion at one end of saidthird sleeve slidable on said inner sleeve, a radial flange extendingoutwardly from said inner sleeve and adapted to bear against the innerwall of said third sleeve, and a ring member secured to said thirdsleeve outwardly of the graduated portion thereof and adapted to abutthe end lof said outer sleeve.

References Cited in the file of this patent UNITED STATES PATENTS1,080,811 Colwell Dec. 9, 1913 1,510,079 Hudson Sept. 30, 1924 1,892,145Guyot Dec. 27, 1932 2,511,270 Kahan June 13, 1950 2,526,408 Posson Oct.17, 1950 2,656,978 Nicolet Oct. 27, 1953

